DELIRIUM IN THE ELDERLY CCSMH NATIONAL GUIDELINES-INFORMED INTERACTIVE CASE-BASED TUTORIAL

1. DELIRIUM IN THE ELDERLYCCSMH NATIONAL GUIDELINES-INFORMEDINTERACTIVE CASE-BASED TUTORIAL Teaching module prepared by: Dr. M. Bosma, FRCPC

2. INTRODUCTION • Guidelines have been developed by the Canadian Coalition for Seniors Mental Health for the diagnosis and management of delirium in the elderly • Please refer to the handout you have been given to work through the following case examples

3. REFERRAL You are a seniors’ mental health clinician working in the hospital. You receive the following referral to see Mrs. Adele O’Leary, who is a patient of the cardiovascular surgery service. “Please see this 75 year old female who is POD#6 for CABGx3. She lays in bed most of the day and is not interacting with staff, which is impairing her recovery. She is confused, and appears sad and unmotivated. Please assess and treat for depression.”

4. WHAT IS YOUR DIFFERENTIAL DIAGNOSIS? Depression Delirium Dementia

5. Before you assess the patient, you wish to be as prepared as possible. You ask yourself the following question: WHAT IS DELIRIUM?

6. DSM-IV DEFINITION Core features of DSM-IV criteria: • Disturbance of consciousness with reduced ability to sustain, or shift attention • Change in cognition or development of a perceptual disturbance not better explained by a preexisting condition • Disturbance develops over a short period of time and tends tofluctuateduring course of the day

7. CLINICAL FEATURES • Acute onset • Usually develops over hours to days • Onset may be abrupt • Prodromal phase • Initial symptoms can be mild/transient if onset is more gradual • Fatigue/daytime somnolence • Decreased concentration • Irritability • Restlessness/anxiety • Mild cognitive impairment Cole 2004 See CCSMH Delirium Guidelines p 22

8. CLINICAL FEATURES • Fluctuation • Unpredictable • Over course of interview • Over course of 1 or more days • Intermittent • Often worse at night • Periods of lucidity • May function at “normal” level • Psychomotor disturbance • Restless/agitated • Lethargic/inactive Cole 2004 See CCSMH Delirium Guidelines p 22

9. CLINICAL FEATURES • Disturbance of consciousness • Hyperalert (overly sensitive to stimuli) • Alert (normal) • Lethargic (drowsy, but easily aroused) • Comatose (unrousable) • Inattention • Reduced ability to focus/sustain/shift attention • Easily distractible • External stimuli interfere with cognition • May account for all other cognitive deficits Cole 2004 See CCSMH Delirium Guidelines p 22

10. CLINICAL FEATURES • Disruption of sleep and wakefulness • Fragmentation/disruption of sleep • Vivid dreams and nightmares • Difficulty distinguishing dreams from real perceptions • Somnolent daytime experiences are “dreamlike” • Emotional disturbance • Fear • Anxiety • Depression Cole 2004 See CCSMH Delirium Guidelines p 22

11. CLINICAL FEATURES • Disorders of thought • Abnormalities in form and content of thinking are prominent • Impaired organization and utilization of information • Thinking may become bizarre or illogical • Content may be impoverished or psychotic • Delusions of persecution are common • Judgment and insight may be poor Cole 2004 See CCSMH Delirium Guidelines p 22

12. CLINICAL FEATURES • Disorders of language • Slow and slurred speech • Word-finding difficulties • Difficulty with writing • Disorders of memory and orientation • Poor registration • Impaired recent and remote memory • Confabulation can occur • Disorientation to time, place, and (sometimes) person Cole 2004 See CCSMH Delirium Guidelines p 22

13. CLINICAL FEATURES • Perceptual disturbances • Distortions • Macropsia/micropsia • Derealization/depersonalization • Illusions • Misinterpretation of external sensory stimuli • Hallucinations • May respond as if they are real • Visual • Often occur only at night • Simple to complex • Auditory • Simple sounds, music, voices • Tactile (less common) Cole 2004

14. DOES DELIRIUM PRESENT SIMILARLY IN ALL PATIENTS? NO THERE ARE THREE CLINICALLY RECOGNIZED VARIANTS

15. CLINICAL VARIANTS 1. Hyperactive • Restless/agitated - Aggressive/hyper-reactive • Autonomic arousal - 15-47% of cases 2. Hypoactive • Lethargic/drowsy • Apathetic/inactive • Quiet/confused • Often escapes diagnosis • Often mistaken for depression • 19-71% of cases 3. Mixed • 43-56% of cases Cole 2004 See CCSMH Delirium Guidelines p 23

16. Now that you have familiarized yourself with the clinical presentation of delirium, you are ready to move on with the case. WHAT OTHER INFORMATION WOULD YOU LIKE TO KNOW ABOUT MRS. O’LEARY?

17. PATIENT HISTORY • Past psychiatric history • Past medical history • Current medications • Family history • Personal history • Pre-morbid cognitive status

18. CASE You now attempt to see Mrs. O’Leary to obtain her history and observe her current mental status. She is dressed in a hospital gown lying in bed, looking older than her stated age. Her eyes are closed, and you have a difficult time rousing her. Her words are slurred and difficult to understand. She is unable to respond appropriately to your questions. She appears to be picking at things in the air. You are unable to assess her mood, but her affect is restricted. She is confused, and when asked where she is mumbles something about “being in Newfoundland”.

19. DELIRIUM SCREENING TOOLS AS PART OF YOUR ASSESSMENT, WHAT ARE SOME POSSIBLE DELIRIUM SCREENING TOOLS YOU COULD USE? MMSE CONFUSION ASSESSMENT METHOD (CAM) MONTREAL COGNITIVE ASSESSMENT (MoCA) You attempt to perform an MMSE, but Mrs. O’Leary is unable to pay attention long enough to complete the test See CCSMH Delirium Guidelines p 29

20. As you are unable to obtain much information from Mrs. O’Leary, what should you do now? OBTAIN COLLATERAL

21. CASE • You review the medical chart and speak with Mrs. O’Leary’s daughter to obtain collateral information. You find out the following information.

22. COLLATERAL No prior psychiatric problems • No history of depression Past medical history: • Angina • Hypertension • Dyslipidemia • Hearing impairment • Uses hearing aid • Hysterectomy (1985) • Smoker (30 pack years)

23. COLLATERAL Medications • Metoprolol 25 mg BID • Atorvastatin 20 mg OD • ECASA 81 mg OD • Multivitamin ī tab OD • Amitriptyline 10 mg HS • Ramipril 5 mg OD* • Ranitidine 150 mg OD* • Hydromorphone 2-4 mg q2h prn* • Receiving approx. 6 mg/day *New medications

24. COLLATERAL No family history of mental illness Personal history Mrs. O’Leary is the second oldest in a sibship of six. She was born in Nova Scotia and achieved a grade 8 education. She worked in a store until she married at the age of 21. She then stayed home to raise 3 daughters. Her husband retired at age 65 and they spent much time in Florida. He passed away two years ago, and Mrs. O’Leary now lives alone in a seniors apartment. Prior to surgery, she had a busy social life, and enjoyed knitting and playing weekly bingo. She does not drink alcohol.

25. COLLATERAL Pre-morbid cognitive functioning • Mrs. O’Leary has occasionally been forgetting names of friends/family over the past year, but there are no other memory deficits. • She is independent for all IADL’s/ADL’s • She scored 30/30 on a recent MMSE done at her GP’s office • Her family now find her drowsy and confused, which gets worse later in the day

26. DIAGNOSIS Now that you have collateral information, you summarize the case: • 76 year old female post-CABG • Decreased level of consciousness • Confused and disoriented • Amotivated and apathetic • Fluctuation of symptoms • No prior history of depression • No prior history of dementia

27. OF YOUR DIFFERENTIAL, WHICH IS THE MOST LIKELY DIAGNOSIS? DEPRESSION DELIRIUM DEMENTIA DELIRIUM

28. WHAT TYPE OF DELIRIUM DO YOU THINK IT IS? HYPERACTIVE HYPOACTIVE MIXED HYPOACTIVE

29. NOW THAT YOU HIGHLY SUSPECT A DIAGNOSIS OF HYPOACTIVE DELIRIUM, WHAT SHOULD YOUR NEXT STEP BE? DELIRIUM “WORK UP” You are looking for an underlying medical cause

30. DELIRIUM “WORK UP” WHAT INVESTIGATIONS WOULD YOU CONSIDER ORDERING? • CBC • Electroytes • BUN/creatinine • Magnesium and phosphate • Calcium and albumin • Liver function tests • TSH • Urinalysis • Blood gases • Blood culture • Chest x-ray • ECG See CCSMH Delirium Guidelines p 33

31. DELIRIUM “WORK UP” REMEMBER THAT DELIRIUM IS A MEDICAL EMERGENCY!! IT IS IMPORTANT TO DO A PHYSICAL EXAMINATION THAT INCLUDES: • Neurological examination • Hydration and nutritional status • Evidence of sepsis • Evidence of alcohol abuse and/or withdrawal See CCSMH Delirium Guidelines p 33

32. INVESTIGATION RESULTS • You perform an appropriate work-up and order investigations. You obtain the following ABNORMAL results: • Na 147 • BUN 17.2 • All other results are normal WHAT DO THE ABOVE RESULTS SUGGEST? DEHYDRATION

33. Now that you have made a diagnosis of delirium and performed the appropriate “work-up”, you need to make a treatment plan. Before you can do this, you need to learn more about the epidemiology and etiology (cause) of delirium. IS DELIRIUM A COMMON DISORDER? YES • It occurs in up to 50% of older persons admitted to acute care settings See CCSMH Delirium Guidelines p 23

34. EPIDEMIOLOGY • Minimal info on community incidence • Age >85: 10% 3 year incidence • Age >65 with dementia: 13% 3 year incidence • Most studies focus on in-patients • Admission to medical unit: • 10-20% prevalence at time of admission • 5-10% incidence during hospitalization • Special populations • Long-term care home residents: 6-14% • General surgical patients: 10-15% • Cardiac surgery patients: 30% • Hip fractures: 50% • Age >65 admitted to ICU: 70% • Palliative advanced cancer patients: 88% Cole 2004 See CCSMH Delirium Guidelines pp 23-4

35. EPIDEMIOLOGY • Delirium is OFTEN UNRECOGNIZED!! • Many cases undiagnosed • ~40% of elderly with delirium sent home from ED in one study • Misdiagnosed as depression • ~40% of cases in one study Hustey et al 2002 Cole 2004

36. Advanced age Male sex Cognitive impairment Dementia Functional impairment Depression Sensory impairment Medication use Narcotics Psychotropics Alcohol abuse Severe medical illness Fever Hypotension Electrolyte abnormalities High urea/creatinine ratios Dehydration Hypoxia Fracture on admission Surgery Especially unplanned WHAT ARE RISK FACTORS FOR DELIRIUM IN THE ELDERLY? Advanced age Electrolyte abnormalities High urea/creatinine ratios Sensory impairment Medication use Surgery WHICH RISK FACTORS DOES MRS. O’LEARY HAVE? See CCSMH DeliriumGuidelines pp 24-26 ( Table 2.1)

37. Drug-induced Sedative/hypnotics Anticholinergics Opioids Alcohol and drug withdrawal Surgical procedures Infection Pneumonia Urinary tract infection Fluid-electrolyte disturbance Dehydration Severe pain Metabolic endocrine Uremia Hypo/hyperthyroidism Cardiopulmonary hypoperfusion and hypoxia CHF Intracranial Stroke Head injury Sensory/environmental Sensory impairment Acute care settings WHAT ARE COMMON POTENTIAL CAUSES OF DELIRIUM? Drug-induced Surgical procedures Sensory/environmental Fluid-electrolyte disturbance WHAT ARE POTENTIAL CAUSES IN MRS. O’LEARY? See CCSMH DeliriumGuidelines pp 24-26 ( Table 2.1)

38. ETIOLOGY MNEMONIC • Infectious • Withdrawal • Acute metabolic • Trauma • Central nervous system pathology • Hypoxia • Deficiencies (nutritional) • Endocrinopathies • Acute vascular • Toxins/drugs • Heavy metals See CCSMH Delirium Guidelines p 31 (Table 3.1)

39. Sedative/hypnotics Benzodiazepines Barbituates Antihistamines Anticholinergic drugs Oxybutynin Trycyclic antidepressants Antipsychotics Warfarin Furosemide (Lasix) Cumulative effect of multiple drugs Narcotics/opioids Histamine blocking agents Ranitidine Anticonvulsants Phenytoin Antiparkinsonian medications Dopamine agonists Levodopa-carbidopa Benztropine HIGH RISK MEDICATIONS See CCSMH Delirium Guidelines p 39 (Table 4.1)

40. MRS. O’LEARY’S MEDICATIONS • Metoprolol 25 mg BID • Atorvastatin 20 mg OD • ECASA 81 mg OD • Multivitamin ī tab OD • Amitriptyline 10 mg HS • Ramipril 5 mg OD • Ranitidine 150 mg OD • Hydromorphone 2-4 mg q2h prn • Receiving approx. 6 mg/day Amitriptyline Ranitidine Hydromorphone WHICH MEDICATIONS MAY CAUSE DELIRIUM?

41. CASE YOU HAVE NOW IDENTIFIED SEVERAL RISK FACTORS AND POTENTIAL CAUSES FOR THIS CASE OF DELIRIUM. WHICH ONE IS THE MOST LIKELY CAUSE? YOU CANNOT SAY - MRS. O’LEARY HAS SEVERAL DIFFERENT POTENTIAL CAUSES DELIRIUM OFTEN HAS A MULTIFACTORIAL ETIOLOGY REMEMBER NOT FINDING A SPECIFIC CAUSE DOES NOT INDICATE THAT A DELIRIUM IS NOT PRESENT - MANY CASES HAVE NO DEFINITE FOUND CAUSE p 30 CCSMH Guidelines

42. MANAGEMENT YOU HAVE NOW MADE A DIAGNOSIS OF HYPOACTIVE DELIRIUM, AND IDENTIFIED SEVERAL POTENTIAL CAUSES. WHAT SHOULD BE YOUR FIRST MANAGEMENT STRATEGY? TREAT ALL POTENTIALLY CORRECTABLE CONTRIBUTING CAUSES OF DELIRIUM

43. MANAGEMENT WHAT ARE YOUR TWO BASIC APPROACHES TO MANAGEMENT? NON-PHARMACOLOGICAL PHARMACOLOGICAL

44. NON-PHARMACOLOGICAL MANAGEMENT Assess safety • Prevent harm to self or others • Try to avoid physical restraints Establish physiological stability • Adequate oxygenation • Restore electrolyte balance • Restore hydration Address modifiable risk factors • Correct sensory deficits • Manage pain • Support normal sleep pattern • See CCSMH Delirium Guidelines pp 33, 35, 36 (Table 3.3)

45. NON-PHARMACOLOGICAL MANAGEMENT Optimize communication • Continuous monitoring of mental status • Calm, supportive approach • Avoid confrontation • Use re-orientation strategies • Clock, calendars • Provide staff consistency • Involve friends/family • Promote meaningful activities • Provide education about delirium See CCSMH Guidelines pp 33, 35, 36 (Table 3.3)

46. NON-PHARMACOLOGICAL MANAGEMENT • Mobilize the older person • Support routines • Encourage self care • Optimize environment • Avoid sensory deprivation and overload • Minimize noise to promote normal sleep pattern • Provide appropriate lighting • Reduces misinterpretations • Promotes sleep at night • Provide familiar objects • Evaluate response to management • Modify as needed • See CCSMH Delirium Guidelines pp 33, 35, 36 (Table 3.3)

47. PHARMACOLOGICAL MANAGEMENT General principles: • Psychotropic medications should be reserved for patients in distress due to agitation or psychotic symptoms • In the absence of psychotic symptoms causing stress, treatment of hypoactive delirium with psychotropic medications is not recommended • Psychotropic medications are not indicated for wandering • Aim for monotherapy at the lowest dose • Taper as soon as possible • See CCSMH Delirium Guidelines p 41

48. PHARMACOLOGICAL MANAGEMENT WHAT TYPES OF MEDICATIONS ARE FREQUENTLY USED IN MANAGING THE SYMPTOMS OF DELIRIUM? ANTIPSYCHOTICS (TYPICAL, ATYPICAL) BENZODIAZEPINES CHOLINESTERASE INHIBITORS OTHERS • See CCSMH Delirium Guidelines pp 41-44

49. TYPICAL ANTIPSYCHOTICS • RCT evidence for haloperidol • Preferred over low-potency antipsychotics • Less anticholinergic • Less sedating • Range of doses/formulations available WHAT DOSE WOULD YOU CONSIDER? START LOW For example 0.25-0.5 mg od-bid • See CCSMH Delirium Guidelines pp 41-44

50. HALOPERIDOL WHAT SIDE EFFECTS WOULD YOU MONITOR FOR? • QT prolongation • Risk of ventricular arrhythmias • Consider getting a baseline ECG • Extrapyramidal side effects • Acute dystonia • Parkinsonism • Akathisia • Neuroleptic malignant syndrome • Orthostatic hypotension (falls) • Oversedation • See CCSMH Delirium Guidelines p 42